### Parameters

| Parameter | Type | Description | Default |
|-----------|------|-------------|---------|
| `table_name` | `str` | Name of the PostgreSQL table | Required |
| `schema` | `Optional[str]` | Database schema name | `"ai"` |
| `db_url` | `Optional[str]` | PostgreSQL connection URL | `None` |
| `db_engine` | `Optional[Engine]` | Pre-configured SQLAlchemy engine | `None` |